package com.feng.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.feng.reggie.common.CustomException;
import com.feng.reggie.dto.SetmealDto;
import com.feng.reggie.entity.Setmeal;
import com.feng.reggie.entity.SetmealDish;
import com.feng.reggie.mapper.SetmealMapper;
import com.feng.reggie.service.SetmealDishService;
import com.feng.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Transactional
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper,Setmeal> implements SetmealService {
    @Autowired
    private SetmealDishService setmealDishService;
    /**
     * 新增套餐，同时需要保存套餐与菜品的关联关系
     * @param setmealDto
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐信息，操作setmal这张表，执行insert操作
        super.save(setmealDto);
        //保存套餐和菜品的关系信息，操作setmeal_dish，执行insert操作
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        setmealDishService.saveBatch(setmealDishes);

    }
    /**
     * 删除套餐，同时需要删除套餐与菜品的关联数据
     * @param ids
     */
    @Override
    public void removeWithDish(List<Long> ids) {
        //查询套餐状态，确定是否可以删除
        LambdaQueryWrapper<Setmeal> queryWrapper=new LambdaQueryWrapper<>();
        //如果不能删除，抛出一个业务异常
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);
        int count = this.count(queryWrapper);
        if(count>0){
            //如果不能删除，抛出一个业务异常

            throw new CustomException("套餐正在售卖中，不能删除！");
        }
        //如果可以删除，先删除套餐表中数据
        this.removeByIds(ids);


        //删除关系表中的数据
     LambdaQueryWrapper<SetmealDish> lambdaQueryWrapper=new LambdaQueryWrapper<>();
     lambdaQueryWrapper.in(SetmealDish::getSetmealId,ids);
     setmealDishService.remove(lambdaQueryWrapper);
    }

    /**
     * 根据id查询数据，对数据进行回显到页面
     * @param id
     * @return
     */
    @Override
    public SetmealDto getDate(Long id) {
        Setmeal setmeal = super.getById(id);
        SetmealDto setmealDto=new SetmealDto();
        LambdaQueryWrapper<SetmealDish> queryWrapper=new LambdaQueryWrapper();
        queryWrapper.eq(SetmealDish::getSetmealId,id);
        List<SetmealDish> list = setmealDishService.list(queryWrapper);
        if(setmeal!=null){
            BeanUtils.copyProperties(setmeal,setmealDto);
            setmealDto.setSetmealDishes(list);
        }
        return setmealDto;

    }

}
